Question

Select the correct answer.

If the range of the function ºf(x) = x/4' is {28, 30, 32, 34, 36}, what is its domain?

Answer 1

A is right. domain = {112, 120, 128, 136, 144}

Explanation:

The range is the y-coordinate while the domain is the x-coordinate

y = x/4

x = 4y

domain = {4(28), 4(30), 4(32), 4(34), 4(36)}

= {112, 120, 128, 136, 144}